Adjustable height hitch ball unit



FIG. 1 is a front elevational view of the adjustable height hitch ball unit of the present invention;

FIG. 2 is a right elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in all views of the drawing are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an adjustable height hitch ball unit, as shown and described. 